本論文為新型透鏡光纖架構研究，首先利用自動化精密研磨方式製造出類四面錐光纖頭端，並利用相同的製程加工出具有不同曲率的橢圓透鏡光纖，此種架構因其特殊的形狀非常適合應用在參鉺光纖放大器中幫浦雷射與光纖的耦合應用，此外在實際雷射與光纖的構裝過程，因構裝精度高且使用雷射銲接方式而有銲後位移產生，本論文利用微反射鏡搭配影像處理技術，線上量測構裝位移以提升雷射模組構構裝精度。
除此之外，目前發展相當快速的短距離用塑膠光纖之塑膠透鏡光纖也是本論文的另一個研究重點，比起長距離用的玻璃光纖，塑膠光纖有著便宜且構裝容易的優點，但在傳輸速度增加使得塑膠光纖核心日益縮小的情況下，雷射與塑膠光纖間的耦合也越來越困難，當然也會造成耦合率的下降，利用塑膠透鏡光纖提升耦合率也成為了重要的課題，本論文提出兩種新型的塑膠透鏡光纖架構，第一種是利用雷射熱焊接技術將微塑膠透鏡與平頭塑膠光纖接合在一起，型成頭端為非球面之塑膠透鏡光纖，此種架構的優點為利用雷射銲接的方式可以快速且精確的接合透鏡與光纖，且可以很精確的控制微透鏡的曲率，因此若選擇適合的曲面參數可得到具高耦合率且工作距離長的塑膠透鏡光纖。根據實驗結果顯示，本架構在200微米的工作距離下可達到80%的耦合效率。另一方面，本論文將高透光之SU-8溶液加於塑膠光纖頭端形成球形微透鏡，並在光纖頭端外加電場利用靜電力將微透鏡拉成預定形狀後再利用UV光固化，而形成近似雙曲線頭端之塑膠透鏡光纖，此種方式不僅加工速度快且容易大量製造，非常適合於一般商業上使用。

This thesis researches in the structure and fabrication of lensed fibers. To begin with, a novel method for automating fiber endface polishing to form quadrangular-pyramid-shaped fiber endface (QPSFE)-like shape is presented. This system successfully supported automatic polishing with an encouraged fiber tip offset. Such an automatic polishing system can also be applied to any other type of fiber endface. Next, an advanced polishing method to form an elliptical microlens endface from a QPSFE-like shape fiber is proposed. There are many advantages of this approach. First, the process to remove the tip of the fiber can be omitted and be replaced by the proposed process. This would raise the yield of the manufacturing of the lensed fiber and reducing manufacturing time and eliminating the possibility of human error. Second, after the process of the proposed method, an elliptic microlens is formed on the end of fiber and the fusing step can be skipped. In addition, in optical module packaging, laser welding used to attach components is expected to cause relative motion between the pre-aligned components. Such shifts might considerably reduce the efficiency of light coupling. This thesis provides a particular method to measurement the fiber shifts along the three axes quickly and precisely.
Furthermore, the efficient coupling of plastic optical fibers (POFs) to the light source has become critical. Two kinds of new schemes of lensed optical fiber for POFs are proposed. The first type of lensed plastic optical fiber (LPOF) scheme is fabricating a convexo-concave-shaped fiber endface (CCSFE) by joining a flat-end POF and a convexo-concave plastic lens (CCPL). The second type of LPOF scheme is fabricating a hyperbola shape LPOF by using electrical force. Both designs of the LPOF all have advantages of easy fabrication and automatic manufacture.

中文摘要 ii
Abstract iv
Contents v
List of Figures vii
List of Tables xii
List of Symbols xiii
Chapter I Introduction 1
1.1 Introduction to optical communication systems 1
1.2 Introduction to lensed optical fibers 2
1.3 Motivation and purpose 3
Chapter II A novel lensed fiber structure for the glass optical fibers 8
2.1 Automation of active GOFs endface polishing method 8
2.1.1 The fabrication of QPSFE 8
2.1.2 Proposed method 9
2.1.3 Experiments and results 15
2.2 Fabricating an ellipse fiber end using an advanced polishing method 18
2.2.1 Theory and polishing method 18
2.2.2 Experiments and Results 21
2.2.3 Conclusion 24
2.3 The inspection method for LD-fiber alignment shift in butterfly laser module packaging 24
2.3.1 Introduction for butterfly laser module packaging 24
2.3.2 Construction of butterfly package and the laser welding process 25
2.3.3 Methods of obtaining and calibrating image 26
2.3.4 Experiments and discussion 30
Chapter III Novel lensed fiber structures for plastic optical fibers 67
3.1 Introduction to the plastic optical fibers (POFs) 67
3.2 The CCSFE POF using laser transmission welding 69
3.2.1 Introduction to CCSFE POF 69
3.2.2 Principle of the laser welding 70
3.2.3 Analysis the parameters of LTW 71
3.2.4 Design and analysis of the CCPL 75
3.2.5 Experiments and results 78
3.2.6 Discussions of the CCSFE POFs 81
3.3 A hyperbola microlens on plastic optical fiber using UV-curable polymer by electrostatic force 82
3.3.1 Analysis of the volume of the microlens 82
3.3.2 Design of surface of lens 83
3.3.3 Experiment and results 85
3.3.4 Discussions 87
Chapter IV Conclusions and future work 109
4.1 Conclusions 109
4.2 Future work 110
References 112
List of Publications 116

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